The title "Duke of Lincoln" is a noble rank in the British peerage system. It was created in 1623 for Robert de Vere, the 3rd Earl of Oxford, and has been associated with the historic county of Lincolnshire. The title has been held by various noble families over the centuries, contributing to the region's heritage. The Duke of Lincoln is part of the House of Lords, the upper house of the UK Parliament. Although the title is not currently active, it remains a significant part of British history and aristocracy, reflecting the social structure of the time.